Code No. P1AFD: Quick charging voltage abnormality



caution If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, always diagnose the CAN bus lines.


OPERATION



  • BMU communicates with EV-ECU via CAN.
  • The quick charging plug communicates with EV-ECU via the local CAN (for the quick charger).

DIAGNOSIS CODE SET CONDITIONS



  • If the difference between the present output voltage and total battery voltage of 10 V or more continues for 5 seconds or longer, the diagnosis code No. P1AFD will be set.

PROBABLE CAUSES



  • Malfunction of quick charger
  • Malfunction of the main battery

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnosis


Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

Go to Step 3.
Repair the CAN bus line. (Refer to GROUP 54C - Troubleshooting .) Then go to Step 2.

STEP 2. Diagnosis code recheck after resetting CAN bus lines


Check again if the diagnosis code No. P1AFD is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Go to Step 3.
This diagnosis is complete.

STEP 3. M.U.T.-III data list


Check the EV-ECU service data. (Refer to .)
Data list
  • Item No. 201 : Battery total voltage
  • Item No. 202 : Condenser voltage
OK: The difference between the condenser voltage and total battery voltage is 10 V or less.

Q. Is the check result normal?

Go to Step 5.
Go to Step 4.

STEP 4. Diagnosis code recheck


Check again if the diagnosis code is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace the main battery assembly. (Refer to .) Then go to Step 6.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)

STEP 5. Diagnosis code recheck


Check again if the diagnosis code is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Check the quick charger. Then go to Step 6.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)

STEP 6. Diagnosis code recheck


Check again if the diagnosis code is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Return to Step 1.
The diagnosis is complete.